~bzr-pqm/bzr/bzr.dev

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
# Copyright (C) 2004, 2005, 2006, 2007 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

from bzrlib.tests import TestCase
from bzrlib.errors import SSHVendorNotFound, UnknownSSH
from bzrlib.transport.ssh import (
    OpenSSHSubprocessVendor,
    PLinkSubprocessVendor,
    SSHCorpSubprocessVendor,
    SSHVendorManager,
    )


class TestSSHVendorManager(SSHVendorManager):

    _ssh_version_string = ""

    def set_ssh_version_string(self, version):
        self._ssh_version_string = version

    def _get_ssh_version_string(self, args):
        return self._ssh_version_string


class SSHVendorManagerTests(TestCase):

    def test_register_vendor(self):
        manager = TestSSHVendorManager()
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
        vendor = object()
        manager.register_vendor("vendor", vendor)
        self.assertIs(manager.get_vendor({"BZR_SSH": "vendor"}), vendor)

    def test_default_vendor(self):
        manager = TestSSHVendorManager()
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
        vendor = object()
        manager.register_default_vendor(vendor)
        self.assertIs(manager.get_vendor({}), vendor)

    def test_get_vendor_by_environment(self):
        manager = TestSSHVendorManager()
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
        self.assertRaises(UnknownSSH,
            manager.get_vendor, {"BZR_SSH": "vendor"})
        vendor = object()
        manager.register_vendor("vendor", vendor)
        self.assertIs(manager.get_vendor({"BZR_SSH": "vendor"}), vendor)

    def test_get_vendor_by_inspection_openssh(self):
        manager = TestSSHVendorManager()
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
        manager.set_ssh_version_string("OpenSSH")
        self.assertIsInstance(manager.get_vendor({}), OpenSSHSubprocessVendor)

    def test_get_vendor_by_inspection_sshcorp(self):
        manager = TestSSHVendorManager()
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
        manager.set_ssh_version_string("SSH Secure Shell")
        self.assertIsInstance(manager.get_vendor({}), SSHCorpSubprocessVendor)

    def test_get_vendor_by_inspection_plink(self):
        manager = TestSSHVendorManager()
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
        manager.set_ssh_version_string("plink")
        self.assertIsInstance(manager.get_vendor({}), PLinkSubprocessVendor)

    def test_cached_vendor(self):
        manager = TestSSHVendorManager()
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
        vendor = object()
        manager.register_vendor("vendor", vendor)
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})
        # Once the vendor is found the result is cached (mainly because of the
        # 'get_vendor' sometimes can be an expensive operation) and later
        # invocations of the 'get_vendor' just returns the cached value.
        self.assertIs(manager.get_vendor({"BZR_SSH": "vendor"}), vendor)
        self.assertIs(manager.get_vendor({}), vendor)
        # The cache can be cleared by the 'clear_cache' method
        manager.clear_cache()
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})

    def test_get_vendor_search_order(self):
        # The 'get_vendor' method search for SSH vendors as following:
        #
        #   1. Check previously cached value
        #   2. Check BZR_SSH environment variable
        #   3. Check the system for known SSH vendors
        #   4. Fall back to the default vendor if registered
        #
        # Let's now check the each check method in the reverse order
        # clearing the cache between each invocation:

        manager = TestSSHVendorManager()
        # At first no vendors are found
        self.assertRaises(SSHVendorNotFound, manager.get_vendor, {})

        # If the default vendor is registered it will be returned
        default_vendor = object()
        manager.register_default_vendor(default_vendor)
        self.assertIs(manager.get_vendor({}), default_vendor)

        # If the known vendor is found in the system it will be returned
        manager.clear_cache()
        manager.set_ssh_version_string("OpenSSH")
        self.assertIsInstance(manager.get_vendor({}), OpenSSHSubprocessVendor)

        # If the BZR_SSH environment variable is found it will be treated as
        # the vendor name
        manager.clear_cache()
        vendor = object()
        manager.register_vendor("vendor", vendor)
        self.assertIs(manager.get_vendor({"BZR_SSH": "vendor"}), vendor)

        # Last cached value always checked first
        self.assertIs(manager.get_vendor({}), vendor)


class SubprocessVendorsTests(TestCase):

    def test_openssh_command_arguments(self):
        vendor = OpenSSHSubprocessVendor()
        self.assertEqual(
            vendor._get_vendor_specific_argv(
                "user", "host", 100, command=["bzr"]),
            ["ssh", "-oForwardX11=no", "-oForwardAgent=no",
                "-oClearAllForwardings=yes", "-oProtocol=2",
                "-oNoHostAuthenticationForLocalhost=yes",
                "-p", "100",
                "-l", "user",
                "host", "bzr"]
            )

    def test_openssh_subsystem_arguments(self):
        vendor = OpenSSHSubprocessVendor()
        self.assertEqual(
            vendor._get_vendor_specific_argv(
                "user", "host", 100, subsystem="sftp"),
            ["ssh", "-oForwardX11=no", "-oForwardAgent=no",
                "-oClearAllForwardings=yes", "-oProtocol=2",
                "-oNoHostAuthenticationForLocalhost=yes",
                "-p", "100",
                "-l", "user",
                "-s", "host", "sftp"]
            )

    def test_sshcorp_command_arguments(self):
        vendor = SSHCorpSubprocessVendor()
        self.assertEqual(
            vendor._get_vendor_specific_argv(
                "user", "host", 100, command=["bzr"]),
            ["ssh", "-x",
                "-p", "100",
                "-l", "user",
                "host", "bzr"]
            )

    def test_sshcorp_subsystem_arguments(self):
        vendor = SSHCorpSubprocessVendor()
        self.assertEqual(
            vendor._get_vendor_specific_argv(
                "user", "host", 100, subsystem="sftp"),
            ["ssh", "-x",
                "-p", "100",
                "-l", "user",
                "-s", "sftp", "host"]
            )

    def test_plink_command_arguments(self):
        vendor = PLinkSubprocessVendor()
        self.assertEqual(
            vendor._get_vendor_specific_argv(
                "user", "host", 100, command=["bzr"]),
            ["plink", "-x", "-a", "-ssh", "-2",
                "-P", "100",
                "-l", "user",
                "host", "bzr"]
            )

    def test_plink_subsystem_arguments(self):
        vendor = PLinkSubprocessVendor()
        self.assertEqual(
            vendor._get_vendor_specific_argv(
                "user", "host", 100, subsystem="sftp"),
            ["plink", "-x", "-a", "-ssh", "-2",
                "-P", "100",
                "-l", "user",
                "-s", "host", "sftp"]
            )